Nitriles react with dialkyldithiophosphoric acids 2 ac to give a mixture of corresponding thioamides and O, O-dialkyl-N-thioaceyl-phosphoroamidothioates 3 ae. The structure of compounds 3 are elucidated chemically and from electronic spectra. The yield of thioamides are improved from the reaction of nitriles with compound 2 b in presence of water. Mechanistic consideration on the formation of the products are discussed.
